Cannot edit posts after upgrade to 3.2

I upgraded to 3.2 across three websites, and while one of them upgraded fine, I have had an issue with two of them.

When I attempt to edit a post, the post text does not load completely in the editor. When I attempt to create a new post, I cannot see the text I type in. I can highlight and see the unformatted text in past posts, but I cannot edit it. I cannot switch to the edit HTML tab or access any of the tools, although their buttons are visible.

I have also noticed that I when I attempt to add an image from the edit post page, instead of a nested window, it opens up the upload image page in the same window as if it were a new page by itself. Uploading images works find, but it will not insert that image into the post. I have to hit back to get back to my post.

Uploading images to the media library works as normal.

I ran a search and found some posts over a year old with a similar issue. Their recommendations were to deactivate plugins or reinstall WordPress.

So, to attempt to fix this:

I deactivated all plugins.
I deleted all plugins from the server.
I ran Health Check to make sure that my host supported the new version. It does.
I backed up my databases and attempted to reinstall 3.2 from the dashboard and saw this error: “Download failed.: Destination directory for file streaming does not exist or is not writable.”
I manually reinstalled 3.2.

After each of these attempts, I returned to my dashboard to see if the issue was fixed. It was not.

I am not sure what other steps I can take.

Linked below is a screenshot of an edit post page. I highlighted the first half of the text so you could see it. There is more unhighlighted, unformated text.

http://www.empowermemagazine.com/wp-content/uploads/screenshot_issue1.jpg